787131493 has 2 divisors, whose sum is σ = 787131494. Its totient is φ = 787131492.

The previous prime is 787131473. The next prime is 787131511. The reversal of 787131493 is 394131787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 756140004 + 30991489 = 27498^2 + 5567^2 .

It is a cyclic number.

It is not a de Polignac number, because 787131493 - 2¹⁷ = 787000421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (787131463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393565746 + 393565747.

It is an arithmetic number, because the mean of its divisors is an integer number (393565747).

Almost surely, 2^787131493 is an apocalyptic number.

It is an amenable number.

787131493 is a deficient number, since it is larger than the sum of its proper divisors (1).

787131493 is an equidigital number, since it uses as much as digits as its factorization.

787131493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 787131493 is about 28055.8637899459. The cubic root of 787131493 is about 923.3133102074.

The spelling of 787131493 in words is "seven hundred eighty-seven million, one hundred thirty-one thousand, four hundred ninety-three".